/ 功能:背部上下行走,分颈肩\背腰\全程 // 座垫一振动，分三档速度 // 小腿一揉捏，分三档速度 // 小腿四敲击，分三档力度-/ function : The next running back, neck and shoulder-\ rear \ wholly// upholstery a vibration, three ratings velocity// shank one stretch, three ratings velocity// percussion f